Assistance training equipment of sit-up exercise

ABSTRACT

An assistant training equipment mainly for helping people to do sit-ups, which comprises a connecting shaft, a supporting assembly and a holding assembly. The connecting shaft consists of a main tube and two sliding shafts slidable receive in the opposite ends of the main tube respectively. Each of the sliding shafts has an elastic bottom, which is to engage to openings on the main tube for locking the connecting shaft in a specific length. The supporting assembly is secured at one end of the connecting shaft for user to put his/her feet thereon. The holding assembling is secured at the other end of the connecting shaft for user to hold it by hands. Thus, when user do sit-ups with the assistance of the present invention, the loading of the user&#39;s back will reduce by user&#39;s hands exerting on the holding assembly.

FIELD OF THE INVENTION

[0001] The present invention relates generally to a training equipment,and more particularly to an assistant training equipment of sit-upexercise.

BACKGROUND OF THE INVENTION

[0002] People pay attention to health and body building in modem life.Some people go in for physical training with a variety of exerciseequipments. Sit-ups exercise is the most popular exercise for peopletraining the abdominal muscles.

[0003] But some people have problem with doing the sit-ups exercisealone. They need someone to press his/her legs to do the Sit-upexercise. Such people may give up after do few times of sit-ups and mayrefuse to do the excise again. More particularly, they are in potentialrisk of getting musculoskeletal injury of abdomen and low back whentaking sit-ups.

[0004] There were combined training machines providing assistantequipment for taking sit-ups. But the machines usually have large sizeand heavy weight, and more particularly they are very expensive.Although there are some types of assistant equipments of sit-up, butthey still have large size for user is inconvenient to operate or tostore at home.

SUMMARY OF THE INVENTION

[0005] The primary objective of the invention is to provide an assistantequipment, which provides an easy and safety way for user to do sit-upsexercise.

[0006] The second objective of the invention is to provide an assistantequipment, which has a simple structure and a lower cost.

[0007] According to the objective of the invention, an assistanttraining equipment comprising a connecting shaft substantially having alength of foot to tight of a general user. A supporting assembly securedat one end of the connecting shaft. The supporting assembly has twosustaining portions at the opposite side of the connecting shaftrespectively for user to put his/her feet thereon, and a holdingassembly secures at the other end of the connecting shaft for user tohold it by hands. Thus, user can do sit-ups with the assistance of theassistant training equipment for reducing the loading of user's back byhands exerting on the holding assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008]FIG. 1 shows an exploded view of a first prefer embodiment of thepresent invention;

[0009]FIG. 2 shows a structure sketch of the prefer embodiment of thepresent invention;

[0010]FIGS. 3 and 4 show the assistant training equipment of the preferembodiment of the present invention in operating respectively;

[0011]FIG. 5 shows a sectional view of an another type of the preferembodiment of the present invention;

[0012]FIG. 6 shows the assistant training equipment of the preferembodiment of the present invention in operating in another way;

[0013]FIG. 7 shows an exploded view of a second prefer embodiment of thepresent invention, and

[0014]FIG. 8 shows a sectional view of the second prefer embodiment ofthe present invention.

DETAIL DESCRIPTION OF THE INVENTION

[0015] As shown in FIG. 1 and FIG. 2, a first prefer embodiment of anassistant equipment 10 of sit-up exercise of present inventioncomprises:

[0016] A connecting shaft 20 has a main tube 21, a first sliding shaft22 a and a second sliding shaft 22 b. The length of the main tube 21 isabout 30 cm, which has openings 23 arranged in a row thereon. The firstand the second sliding shaft 22 a and 22 b are tubes and are about 30 cmin length in the present embodiment. The first and the second slidingshaft 22 a and 22 b insert into the opposite ends of the main tube 21for sliding along the axial direction of the main tube 21. Each of thefirst and the second sliding shaft 22 a and 22 b respectively disposesan opening 25 thereon closing to proximal ends 24 thereof. Two elasticmembers 26 of V-shaped pieces receive in the first and the secondsliding shaft 22 a and 22 b. Each of the elastic members has an elasticbottom 27 respectively passing through the openings 25 of the first andthe second sliding shaft 22 a and 22 b and one of the openings 23 of themain tube 21. Thus, the connecting shaft 20 can adjust the lengththereof by shifting the first and the second sliding shaft 22 a and 22 bin the range of about 60 cm to 90 cm. It is the range of the high offeet to thigh of a general person. The length of the connecting shaft 20is variety depended on the average height of people in specific areas.The first and the second sliding shaft 22 a and 22 b respectively havescrew holes 29 at distal ends 28 thereof.

[0017] A supporting assembly 30 disposes at the distal end 28 of thefirst sliding shaft 22 a of the connecting shaft 20. The supportingassembly 30 comprises a tube member 31 having a through hole 32 at themidsection thereof. The tube member 31 is secured at the first slidingshaft 22 a by means of screwing a bolt 33 into the screw hole 29 of thefirst sliding shaft 22 a via the through hole 32 of the tube member 31.Two sustaining portions 34 are formed at the tube member 31 divided bythe first sliding shaft 22 a where user can put his/her feet thereon.The tube member 31 forms two receiving spaces 35 therein divided by thefirst sliding shaft 22 a for receiving two springs 50 a and 50 brespectively. Two sleeves 36 detachable cover at the opposite ends ofthe tube member 31 for closing the openings of the receiving spaces 35.

[0018] A holding assembly 40 disposes at the distal end 28 of the secondsliding shaft 22 b of the connecting shaft 20. The holding has a tubemember 41, which is bent into a predetermined obtuse angle and has athrough hole 42 at the bended point thereof. The tube member 41 issecured at the second sliding shaft 22 b by means of screwing a bolt 43into the screw hole 29 of the second sliding shaft 22 b via the throughhole 42 thereof. Similarly, the tube member 41 has two receiving spaces44 therein for receiving two springs 50 c and 50 d. The four springs 50a, 50 b, 50 c and 50 d have different coefficients of elasticity. Twosleeves 45 detachable cover at the opposite ends of the tube member 41respectively for closing the openings of the receiving spaces 44. Thesleeves 45 are also for user to hold, so they can be made of soft rubberor foam material to enhance comfort.

[0019] Please refer to FIG. 3 and FIG. 4, when operating the assistanttraining equipment 10 of the first prefer embodiment of the presentinvention, user lies down on a ground and put the assistant trainingequipment 10 between his/her legs with putting feet on the sustainingportions 34 of the supporting assembly 30 and with hands holding theholding assembly 40 as shown in FIG. 3. When user trying to bend truck,as shown in FIG. 4, the loading of back of user will be shared by handsexerting on the assistant training equipment 10 of the presentinvention. For the same reason, when user trying to lie down, theloading of back will reduce by hands exerting on the assistant trainingequipment 10. Whereby, a general user can do sit-ups in an easier wayand can reduce the risk of getting musculoskeletal injury.

[0020] The connecting shaft 20 can adjust the length by means ofpressing the bottoms 27 to make the first and the second sliding shaft22 a and 22 b shifting along the main tube 21. When the bottoms 27locking in another openings 23 of the main tube 21 to secure theconnecting shaft 20 in a specific length to meet the specific user.However, the connecting shaft 20 can be made from a single shaft or tubeto construct the assistant training equipment 10 of the presentinvention but without the function of changing the length.

[0021] The supporting assembly 30 and the holding assembly 30 can bedisassembled by loosing the bolts 33 and 43 for facilitating theassistant training equipment 10 of the present invention to store or tocarry. However, It is easy to understand that the supporting assembly 30and the holding assembly 40 can be fixed at the opposite end of theconnecting shaft 20.

[0022] The assistant training equipment 10 of the present invention hasa second finction for training. Please refer to FIG. 5, we pick one ofthe springs 50 a, 50 b, 50 c or 50 d (which is labeled 50′ in FIG. 5)and install it in the main tube 21 of the connecting shaft 20. Thesecond sliding shaft 22 b is turned (it also can be done by turning thefirst sliding shaft 22 a) for the bottom 27 of the elastic member 26will not longer be locked by the openings 23 of the main tube 21. Thus,the second sliding shaft 22 b can slide inward or outward the main tube21 and the spring 50′ will provide it a resistant force.

[0023] Please refer to FIG. 6, user can put the supporting assembly 30on his/her tights and hold the holding assembly 40 by hands to push itdownward. It provides a second way to train the muscles of arms andabdomen. The second training function of assistant training equipment 10of the present invention also can be done by putting the supportingassembly 30 on the abdomen and exerting the holding assembly 40 byhands. Or put the assistant training equipment 10 between legs fortights exerting the supporting assembly 30 and the holding assembly 40inwards to train tights' muscles. User can adjust the strength of theresistant force by replacing the springs 50 a, 50 b, 50 c or 50 d.

[0024] The assistant training equipment 10 of the present invention alsocan apply to the calisthenics excise or the other physical excise.

[0025]FIG. 7 and FIG. 8 show an assistant training equipment 60 of thesecond prefer embodiment of the present invention, which comprises aconnecting shaft 70, a supporting assembly 80 and a holding assembly 90.Wherein, the connecting shaft 70 mainly consists of a main tube 71 and asliding shaft 75. The sliding shaft 75 slidable receives in the maintube 71 and provides an elastic bottom 76 therein to engage to one ofopenings 72 for locking the sliding shaft 75. The structure ofdescribed-above elements is as same as the first prefer embodiment, sowe will not describe the detail here. We further provide two connectingtubes 73 and 74 at the opposite ends of the connecting shaft 70, andeach of them respectively has two openings 74 and 78 thereon. Thesupporting assembly 80 has two shafts 81 and the holding assembly 90also has two shafts 91. The shafts 81 and 91 of the supporting assembly80 and the holding assembly 90 insert into the opposite ends of theconnecting tubes 73 and 74 of the connecting shaft 70. The shafts 81 and91 of the supporting assembly 80 and the holding assembly 90 each has anelastic bottoms 82 and 92 (same structure as described above) thereinfor engaging to the openings 74 and 78 of the connecting tubes 73 and 77of the connecting shaft 70 to lock the shafts 81 and 91. Two elasticropes 83 and 93 respectively receive in the connecting tubes 73 and 77and the shafts 81 and 91 of the supporting assembly 80 and the holdingassembly 90 and have both end respectively securing at the shafts 81 and91.

[0026] The assistant training equipment 60 of the second preferembodiment of the present invention can provides the same function asthe first prefer embodiment. Further, the shafts 81 and 91 of thesupporting assembly 80 and the holding assembly 90 can be collapsed asshown in FIG. 8 for facilitating to store or to carry.

What is claimed is
 1. An assistant training equipment comprising: aconnecting shaft substantially having a length of distance of foot totight of a general user; a supporting assembly provided at one end ofsaid connecting shaft; said supporting assembly having two sustainingportions at the opposite sides of said connecting shaft for user to putfeet thereon, and a holding assembly provided at the other end of saidconnecting shaft for user to hold it by hands.
 2. The assistant trainingequipment as defined in claim 1, wherein said connecting shaft canchange the length.
 3. The assistant training equipment as defined inclaim 2, wherein said connecting shaft comprising a main tube and twosliding shafts; said main tube having openings thereon; said slidingshafts slidable receiving in the opposite ends of said main tuberespectively; each of said sliding shafts having an elastic bottomthereon for engaging to said openings of said main tube to lock saidsliding shafts; said supporting assembly and said holding assemblyrespectively securing at the distal ends of said sliding shafts.
 4. Theassistant training equipment as defined in claim 3, wherein said slidingshaft being a tube and having a opening thereon; a substantiallyV-shaped elastic member received in said sliding shaft; said elasticbottom provided at said elastic member and passing through said opening.5. The assistant training equipment as defined in claim 3, wherein oneof said sliding shafts being free sliding along said main tube by meansof turning said sliding shaft to a predetermined angle for said elasticbottom thereof not engaging to said openings of said main tube; a springreceiving in said main tube with one end thereof being against on saidsliding shaft for providing said sliding shaft a resistant force.
 6. Theassistant training equipment as defined in claim 5, wherein saidsupporting assembly and said holding assembly being substantiallyshafted elements having midsections thereof respectively securing to theopposite ends of said connecting shaft; each of said supporting assemblyand said holding assembly having two receiving spaces, which are openingat the opposite ends of said supporting assembly and said holdingassembly; four sleeves respectively covering at the opposite ends ofsaid supporting assembly and said holding assembly for closing theopenings of said receiving spaces; said receiving spaces canrespectively receives a spring therein for user to pick one of them toinstall in said main tube of said connecting shaft.
 7. The assistanttraining equipment as defined in claim 2, wherein said connecting shaftcomprising a main tube and a sliding shaft; said main tube havingopenings thereon; said sliding shaft slidable receiving in one end ofsaid main tube; said sliding shaft having an elastic bottom thereon forengaging to said openings of said main tube to lock said sliding shaft;said supporting assembly and said holding assembly respectively securingat the distal ends of said main tube and said sliding shaft.
 8. Theassistant training equipment as defined in claim 7, wherein said slidingshaft being a tube and having a opening thereon; a substantiallyV-shaped elastic member received in said sliding shaft; said elasticbottom provided at said elastic member and passing through said opening.9. The assistant training equipment as defined in claim 7, wherein saidsliding shaft being free sliding along said main tube by means ofturning said sliding shaft to a predetermined angle for said elasticbottom thereof not engaging to said openings of said main tube; a springreceiving in said main tube with one end thereof being against on saidsliding shaft for providing said sliding shaft a resistant force. 10.The assistant training equipment as defined in claim 9, wherein saidsupporting assembly and said holding assembly being substantiallyshafted elements having midsections thereof respectively securing to theopposite ends of said connecting shaft; each of said supporting assemblyand said holding assembly having two receiving spaces, which are openingat the opposite ends of said supporting assembly and said holdingassembly; four sleeves respectively covering at the opposite ends ofsaid supporting assembly and said holding assembly for closing theopenings of said receiving spaces; said receiving spaces canrespectively receives a spring therein for user to pick one of them toinstall in said main tube of said connecting shaft.
 11. The assistanttraining equipment as defined in claim 1, wherein said supportingassembly and said holding assembly being detachable secured at theopposite ends of said connecting shaft.
 12. The assistant trainingequipment as defined in claim 11, wherein said connecting shaft havingtwo screw holes at the opposite ends thereof respectively; saidsupporting assembly and said holding assembly each has a through holefor bolts passing trough and screwing into said screw holes fordetachable securing said supporting assembly and said holding assemblyon said connecting shaft.
 13. The assistant training equipment asdefined in claim 11, wherein said connecting shaft having two connectingtubes at the opposite ends thereof respective; each of said connectingtubes having two openings thereon; said supporting assembly having twoshafts; said holding assembly having two shafts; said shafts of saidsupporting assembly and said holding assembly inserting into theopposite ends of said connecting tubes respectively; each of said shaftsof said supporting assembly and said holding assembly respectivelyhaving an elastic bottom for engaging to said corresponding opening ofsaid connecting tube.